Q. 24.4( 7 Votes )

# Write the common difference of an A.P. whose nth term is a_{n} = 3n + 7.

Answer :

If a_{n} = 3n + 7

Then a_{1} = 3 (1) + 7 = 10

a_{2} = 3(2) + 7 = 13

a_{3} = 3(3) + 7 = 16

d= common difference = a_{n} – a _{n–1}

= a_{3} – a_{2}

= 16 – 13 = 3

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